As can be understood from the title, there is a specific form of denial attack where specific transactions are blocked by submitting transactions with strategically calculated gas prices.
Example 1: ...

I am wondering whether a 51% attack would be simplified by being able to remotely crash miner nodes. Consider the following scenario:
Malicious mining pool A controls 16% percent of the mining power ...

I would like to know how to set up an Ethereum node behind sentries (proxy nodes). I know there are several ways to approach this issue as mentioned here.
https://medium.com/@kidinamoto/tech-choices-...